Maksim Totmin
4c34f0bedc
Streams H.264 to the Galahad II LCD via USB (gousb) with: - ffmpeg CLI transcoding (no fragile FFmpeg C-ABI bindings) - pure-Go Annex-B access-unit splitting - framerate pacing with graceful shutdown and USB reconnect - TOML config, cobra CLI, structured slog logging, unit tests
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
// Package cli implements the galahad2lcd command-line interface.
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package cli
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import (
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"context"
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"fmt"
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"log/slog"
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"os"
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"github.com/spf13/cobra"
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)
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// Execute runs the CLI and returns the first error encountered. The version
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// is injected by the caller (typically main via -ldflags).
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func Execute(version string) error {
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root := newRootCmd(version)
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return root.Execute()
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}
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func newRootCmd(version string) *cobra.Command {
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var verbose bool
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root := &cobra.Command{
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Use: "galahad2lcd",
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Short: "Driver for the Lian Li Galahad II LCD",
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Long: `galahad2lcd streams H.264 video to the Lian Li Galahad II LCD
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display over USB.`,
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SilenceUsage: true,
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SilenceErrors: true,
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PersistentPreRun: func(cmd *cobra.Command, _ []string) {
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level := slog.LevelInfo
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if verbose {
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level = slog.LevelDebug
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}
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slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: level})))
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},
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}
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root.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "enable debug logging")
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root.AddCommand(
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newDaemonCmd(),
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newSetCmd(),
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newListCmd(),
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newVersionCmd(version),
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)
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return root
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}
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func newVersionCmd(version string) *cobra.Command {
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return &cobra.Command{
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Use: "version",
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Short: "Print the version and exit",
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Args: cobra.NoArgs,
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RunE: func(cmd *cobra.Command, _ []string) error {
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fmt.Fprintln(cmd.OutOrStdout(), version)
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return nil
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},
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}
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}
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// signalContext returns a context cancelled on SIGINT and SIGTERM so that
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// systemctl stop and Ctrl-C both trigger a clean shutdown.
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func signalContext() (context.Context, context.CancelFunc) {
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return newSignalContext()
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}
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